TABLE 1.

Comparison of experimental peptide masses obtained from the spectra shown in Fig. 3 with theoretical peptide masses obtained from virtual tryptic digestion of the ShmR protein from S. meliloti 1021

Peptide sequence	Theoretical mass (Da)	Exptl mass (Da)	Difference (Da)
G109-R114	586.33	586.33	0.00
L55-R60	615.35	615.36	0.01
T632-K637	662.38	662.38	0.00
V737-F743a	850.47	850.47	0.00
A101-R108a	905.48	905.48	0.00
I706-R713a	939.50	939.52	0.02
D726-R733	970.43	970.42	−0.01
T351-R359	991.52	991.51	−0.01
I275-R283	993.54	993.52	−0.02
K705-R713	1,067.60	1,067.59	−0.01
T734-R742	1,079.62	1,079.69	0.07
Q81-R90	1,131.56	1,131.56	0.00
I275-R284	1,149.63	1,149.62	−0.01
I300-R309	1,172.52	1,172.51	−0.01
G714-R725	1,187.60	1,187.59	−0.01
S426-R436	1,191.60	1,191.60	0.00
T734-F743	1,226.68	1,226.66	−0.02
F265-R274	1,237.61	1,237.60	−0.01
A334-R343	1,280.62	1,280.61	−0.01
T180-K191	1,302.64	1,302.57	−0.07
D726-K736	1,346.63	1,346.62	−0.01
V694-K705	1,382.73	1,382.69	−0.04
Y298-R309	1,463.68	1,463.67	−0.01
A101-R114	1,472.80	1,472.74	−0.06
F218-R230	1,489.74	1,489.74	0.00
D726-K736	1,495.67	1,495.66	−0.01
I437-R451	1,503.81	1,503.79	−0.02
D285-R297	1,515.73	1,515.70	−0.03
F218-K231	1,617.84	1,617.81	−0.03
G543-R558	1,669.78	1,669.76	−0.02
I298-R311	1,734.80	1,734.78	−0.02
S91-R108	1,875.96	1,875.89	−0.07
T249-K264	1,892.90	1,892.87	−0.03
I115-R132	1,916.04	1,916.02	−0.02
S199-R217	1,949.88	1,949.86	−0.02
T605-K622	2,004.95	2,004.92	−0.03
D377-R395	2,083.97	2,083.94	−0.03
T180-R198	2,148.06	2,148.03	−0.03
D726-F743	2,178.09	2,178.07	−0.02
F265-R283	2,212.13	2,212.09	−0.04
V228-R333	2,288.99	2,288.96	−0.03
R694-R713	2,303.21	2,303.19	−0.02
A374-R395	2,340.12	2,340.10	−0.02
T351-R373	2,468.18	2,468.15	−0.03
V559-R583	2,769.31	2,769.28	−0.03

^aPeptide sequenced.